01/26/2005 FOR: Donaldson Europe Interleuvenlaan, 1 B3001, Leuven Belgium (NYSE: DCI) Donaldson Employee Susanne Fulko Donaldson Employee +49 2129 569 201 IFS-europe@emea.donaldson.com FOR IMMEDIATE RELEASE HOW EFFECTIVE DOES YOUR DUST REMOVAL EQUIPMENT OPERATE? Dust emission measurement as a service Effective dust removal and filtration helps protect both the employees in your company and the environment. For this reason it I now required by law that critical values for dust and pollutant concentrations are specified in the work place regulations of companies. The TA air specifies the critical values for the corresponding emissions, i.e. for the exhaust air of dust removal equipment. The area-wide service team of Donaldson’s Industrial Filtration Solutions Group, IFSG, has now been equipped with mobile emission measuring instruments, which permit a simple and exact on-site measurement of the dust concentration. Donaldson now offers these measurements as a service. The first measurement takes place directly at the source where dust emerges. It records the dust load at the point of suction, i.e. the entrance emission, which can be matched with the MAK-values. The second measurement takes place at the exit of the dust removal unit which shows whether the critical values of the TA air have been adhered to. In each case the particles are measured as a unit of volume (mg/mі). With these measurements the user can determine in a simple and economical way whether legal requirements as well as their responsibility towards employees and environment have been fulfilled. Apart from that, a correlation of both measured values gives very accurate information about the efficiency of the dust removal equipment. Donaldson IFSG offers the new service "dust emission measurement" for all plants, irrespective of make. Did we arouse your interest? Then contact us. Donaldson Company, Inc., headquartered in Minneapolis, Minn., is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Donaldson serves customers in the industrial and engine markets including in-plant air cleaning, compressed air and gas purification, power generation, specialty filtration, off-road equipment and trucks. Our 10,000 employees contribute to the company’s success at over 30 manufacturing locations around the world. In fiscal year 2004, Donaldson reported sales of more than .4 billion and grew earnings for the 15th consecutive year. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI. Additional company information is available at www.donaldson.com.